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What would be the cutoff score for selecting the top

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Reference no: EM132167104

Assignment : Z-Scores Application

Use your knowledge of z scores and the standard normal distribution to solve the following problems. By the due date assigned, post your answers to the Submissions Area. Explain in detail how you arrived at the answers.

1. The graduate selection committee wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard deviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed?

2. The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15 minutes.

Assume that the commute times are normally distributed. What proportion of commutes would be:

a. longer than 80 minutes?

b. less than 50 minutes?

c. between 45 and 75 minutes?

3. Bob takes an online IQ test and finds that his IQ according to the test is 134. Assuming that the mean IQ is 100, the standard deviation is 15, and the distribution of IQ scores is normal, what proportion of the population would score higher than Bob? Lower than Bob?

All written assignments and responses should follow APA rules for attributing sources.

Reference no: EM132167104

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